Three-time Super Bowl champion linebacker Jim Fahnhorst, who played seven seasons with the San Francisco 49ers, died Wednesday, the team announced. He was 66. Fahnhorst joined the 49ers in 1984 , Minnesota’s Jim Fahnhorst, part of 49ers’ Super Bowl brother duo, dies at 66 Jim Fahnhorst and his brother Keith were First Team All-Big Ten players at the University of Minnesota., Three-time Super Bowl winner Jim Fahnhorst has died at the age of 66, the San Francisco 49ers announced on Thursday. The team announced Fahnhorst passed away on Wednesday but did not divulge a , Three-time Super Bowl winner Jim Fahnhorst has died. He was 66. A fourth-round pick of the Vikings in 1982, Fahnhorst (a linebacker) never played in a regular-season game with Minnesota. Instead, after two years with the USFL, Fahnhorst landed with the 49ers. From 1984 through 1990, Fahnhorst , "The San Francisco 49ers are deeply saddened by the passing of former linebacker Jim Fahnhorst, who passed away on Wednesday, September 17th at the age of 66," they wrote., Former San Francisco 49ers linebacker Jim Fahnhorst, who won three Super Bowls during his seven-year career with the franchise, died Wednesday. He was 66. Fahnhorst appeared in 82 games with the 49ers from 1984-90, starting 39. He finished with 232 tackles, seven interceptions and one sack..